Tube cross-reference
4JC6A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 4JC6A voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 4JC6A
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
4JD6 Voltage Pentode - Sharp Cutoff (single)
- Base
- 9PM
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 4.5 V
- Heater current
- 0.45 A
Replacement tubes for 4JC6A
The following tubes are recorded as possible replacements for 4JC6A. This direction does not establish that 4JC6A can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 4HM6 as a possible replacement for4JC6A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Remote Cutoff (single)
The database records 4HT6 as a possible replacement for4JC6A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4JC6 as a possible replacement for4JC6A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.5 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4JD6 as a possible replacement for4JC6A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.5 V |
| Heater current | 0.45 A | 0.45 A |
Where 4JC6A can be used as the replacement
In these recorded relationships, 4JC6A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 4JC6A.
Voltage Pentode - Remote Cutoff (single)
The database records 4JC6A as a possible replacement for4EH7.
- Not suitable for all circuits
| Specification | 4JC6A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9A0 |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.4 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4JC6A as a possible replacement for4EJ7.
- Not suitable for all circuits
| Specification | 4JC6A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9A0 |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.4 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4JC6A as a possible replacement for4HM6.
No special restrictions are recorded for this substitution.
| Specification | 4JC6A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Remote Cutoff (single)
The database records 4JC6A as a possible replacement for4HT6.
No special restrictions are recorded for this substitution.
| Specification | 4JC6A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4JC6A as a possible replacement for4JC6.
No special restrictions are recorded for this substitution.
| Specification | 4JC6A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.5 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4JC6A as a possible replacement for4JD6.
No special restrictions are recorded for this substitution.
| Specification | 4JC6A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 4.5 V | 4.5 V |
| Heater current | 0.45 A | 0.45 A |
Verify before substituting
Matching a base or heater voltage is not enough to prove that two tubes are interchangeable. Check pin connections, heater current, maximum ratings, bias requirements, warm-up behavior, and the equipment manufacturer’s service documentation before making a substitution.
View the complete 4JC6A specifications →